The number of moles : n = 4.95 x 10 ²⁴
Further explanationGiven
2.98E28 molecules of water
Required
The number of moles
Solution
The mole is the number of particles(molecules, atoms, ions) contained in a substance
1 mol = 6.02.10²³ particles
Can be formulated
N=n x No
N = number of particles
n = mol
No = Avogadro's = 6.02.10²³
n = N : No
n = 2.98 x 10²⁸ : 6.02.10²³
n = 4.95 x 10 ²⁴
If a car traveling at 75 mph west, changes its direction to east, does its acceleration change?
yes or no (1pt)
and explain why you chose the answer
Answer:
No because it changes velocity, instead of accelerating
Explanation:
and yes, I am in K12 ツ
Answer:
no
Explanation:
it changes velocity, instead of accelerating
Which of these is an example of genetic variation?
A. Two lizards are fighting and one loses its tail.
B. Bacteria reproduce asexually and produce two clones.
C. Two sisters are born with brown hair and one dyes their hair blonde.
D. In butterflies, some are born with more dark colored spots than others.
Answer:
D. in butterflies, some are born with more dark colored spots than others.
Explanation:
hope this helps my friend
During the summer months, glaciers at the poles melt, delivering fresh water to the ocean. What does this do to salinity? (giving 17 points for this one)
Question 3 options:
lowers salinity
it does not change the salinity
raises salinity
Answer:
lowers salinity
Explanation: I did the quiz on k-12 hope this helps good luck
In an ecosystem with glaciers its melting lowers salinity of the ocean ,delivering fresh water to the ocean.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
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I WILL GIVE YOU BRAINLY PLSS!!! :(
Budding is a form of ______________ reproduction in which a new ______________
develops from a bud or outgrowth due to _________ division. The new organism remains
attached as it grows, separating from the ___________________ only when it is mature.
3. Vegetative reproduction is a form of _____________ reproduction in ___________ .
It is a process by which new organisms are produced without _______________ or
_______________ . It can occur naturally or be induced by ______________________ .
Answer:
Budding is a type of asexual reproduction in which a new organism develops from an outgrowth or bud due to cell division at one particular site.
Explanation:
Answer:
Budding is a type of asexual reproduction in which a new organism develops from an outgrowth or bud due to cell division at one particular site.
Explanation:
Identify the correct equilibrium constant expression for this equation:
2 upper N upper O (g) plus upper O subscript 2 (g) double-headed arrow 2 upper N upper O subscript 2 (g).
K subscript e q equals StartFraction StartBracket upper N upper O EndBracket superscript 2 StartBracket upper O subscript 2 EndBracket over StartBracket upper N upper O EndBracket superscript 2 EndFraction.
K subscript e q equals StartFraction StartBracket upper N upper O subscript 2 EndBracket superscript 2 over StartBracket upper N upper O EndBracket superscript 2 StartBracket upper O subscript 2 EndBracket EndFraction.
K subscript e q equals StartFraction StartBracket upper N upper O EndBracket over StartBracket upper N Upper O subscript 2 EndBracket StartBracket upper O subscript 2 EndBracket EndFraction.
Answer:
First Option: B)
Second Option: C)
The pictures below will show the answers. The first picture is the first option, and the second picture is the second option.
Answer:
Question 1 : B
Question 2: C
Explanation:
Hope this helps!
Edge 2022
Given the reaction below:
N2 (9)
+
(g) + N205 (9)
What is the oxidizing agent of the reaction?
The oxidizing agent of the reaction : O₂
Further explanationGiven
Reaction
N₂ + O₂ ⇒ N₂O₅
Required
The oxidizing agent
Solution
The balanced equation :
2N₂ + 5O₂ ⇒ 2N₂O₅
Oxidation is an increase in oxidation number, while reduction is a decrease in oxidation number.
In the redoxs reaction, it is also known :
The reducing agents : a substance that experience oxidation
The oxidizing agent : a substance that is reduced
2N₂ → 2N₂O₅ (oxidation of N)
0 to +5
5O₂ → 2N₂O₅ (reduction of O)
0 to -2
So N₂ reducing agent, O₂ an oxidizing agent.
The amount of matter in a given amount of volume is referred to as
A. Weight
B. Mass
C. Density
D. Volume^2
Answer:
It would be Density because:
Density= mass/ volume
Density refers to the amount of matter or mass of a substance over a volume
If the arrows below indicate the path of a beam of light, which diagram shows an example of reflection?
Answer: bot sure
Explanation:
What happens to the charge if a nonmetal
takes two valence electrons?
Answer:
if a non-metal takes two valence electrons then it get negatively charged to form ion.
Answer:
The nonmetal will gain a negative charge of magnitude 2
Explanation:
X be the nonmetal
On gaining two electrons
X^2-
WILL MARK BRAINLIEST
*please answer correctly*
I’ve been stuck on this question for a while so I’d appreciate it
PLS HELP!! it’s science how do waves travel through gas
By 'waves' do you mean sound waves? If so sound waves need to travel through things like solids, liquids and yup gases. When the waves travel they are vibrating the molecules in the matter. By doing this he molecules in solids are packed very tightly.
Complete the Lewis structures for diazine (C5H4N2) showing the two most common resonance forms. Draw the Lewis structures with the formal charges minimized.
Answer:
See explanation and image attached
Explanation:
Lewis structures dot structures that show the number of valence electron in a molecule. Sometimes, we show bonded electrons using a single line as in the image attached.
Two images are shown. They are the both resonance structures of diazene. The both structures only differ in the arrangement of electrons as we can see from the image.
PLEASE HELP ASAP WILL GIVE Brainlist
Answer:
3 5 5 3
Explanation:
Not 100% sure on this question
The radioisotope technetium-99 is often used as a radiotracer to detect disorders of the body. It has a half-life of 6.00 hours. If a patient received a 20.0 mg dose of this isotope during a medical procedure, how much would remain 24.0 hours after the dose was given?
Answer:
[tex]0.25\ \text{mg}[/tex]
Explanation:
[tex]t_{1/2}[/tex] = Half-life of technetium-99 = 6 hours
[tex]N_0[/tex] = Initial mass of sample = 20 mg
[tex]t[/tex] = Time elapsed = 24 hours
Amount of mass remaining is given by
[tex]N=N_0e^{-\dfrac{\ln 2}{t_{1/2}}t}\\\Rightarrow N=20e^{-\dfrac{\ln 2}{6}\times 24}\\\Rightarrow N=0.25\ \text{mg}[/tex]
The amount of the sample that would remain is [tex]0.25\ \text{mg}[/tex].
Which of the following IS NOT an ionic compound?
A) C2H5OH
B) KCI
C) Mg3N2
D) MnO2
How many moles are in 9.63 x 10^22 atoms of Ar?
Answer:
0.16 moles of Ar
Explanation:
One mole is equal to 6.022×10^23 atoms
9.63 x 10^22 atoms * 1 mol/6.022×10^23 atoms = 0.15991364995 moles
which of the following uses mechanical energy to function?
A. computer
B. battery
C. microwave oven
D. windmill
ughh please help me
Answer:
Substance 2
Explanation:
The stronger the intermolecular forces are, the more energy is required, so the higher the melting point is.
Answer:
Substance 2
Explanation:
I know this because substances with a stronger molecular attraction are less susceptible to melting quicker than substances who have a weaker attraction with each particle. Therefore, substance 2, which melted after substance 1, has a stronger molecular attraction then substance 1.
(copy and paste above if you want)
What is the name of N2Br6?
Answer:
Dinitrogen hexabromine
In continuing to think about the rock cycle, we know the phases can take thousands, even millions of years to occur. Which stage in the cycle can happen in mere hours or days?
a. Lithification and Erosion
b. Heat and pressure
C. Compaction and weathering
d. Cooling & Crystallization
Answer:
d. Cooling & Crystallization
Explanation:
One of the stages of the rock cycle that can take place under mere hours or days is cooling and crystallization.
Cooling and crystallization of lava on the earth surface is a very rapid and fast process.
When magma from within the earth reaches the surface, it becomes lava. Due to the nature of the surface, it cools rapidly and very fast to form very fine grained igneous rocks.
Areas near large bodies of water tend to have which type of climate
Answer:
mild
Explanation:
please help, will give brainliest
Answer:
Explanation:
chemical change is a change where mew substance is formed
Iwhich
of the following is an ionic compound?
a. HCl(aq)
b. KClaa
C. C103(g)
d. NCl3
Answer:
KCl is an Ionic compound
Explanation:
what kinds of things could a magnet make another object or magnet do without touching it?
Answer:
Magnets can be used to make other magnets and things made of iron move without being touched. Something that has been electrically charged can make other things move without touching them.
Explanation:
(can someone help me with my question?)
i am so bad at chemistry please help if u know..!
Explanation:
try solving by using molecular formula.
you've asked this so many times
Describe the paper
chromatography in short.
Answer:
Paper chromatography, in analytical chemistry, technique for separating dissolved chemical substances by taking advantage of their different rates of migration across sheets of paper. It is an inexpensive but powerful analytical tool that requires very small quantities of material.
Explanation:
Hope it is helpful....
To calculate acceleration you must know both the objects velocity and _______________ 1pt
Answer:
i think its speed
Explanation:
Answer:
Velocety and mass
Explanation:
Nucleus Nucleus Atom 1 Atorn 2 Nucleus Nucleus Atom 3 Atom 4 Which two atoms are of elements in the same group in the periodic table?
Explanation:
The atoms of elements on the same period on the periodic table typically have the same number of valence electrons.
They have the same electronic configuration.
Valence electrons are electrons in the outermost shell of an atom.
The number of electrons in an atom is a good indicator of elements that might potentially belong to the same group.
Which statement best explains how the gases of the atmosphere affect the temperature of Earth?
A
The gases reflect all of the heat from the Sun, preventing it from reaching Earth's surface.
B
The gases absorb all of the heat from Earth's surface, preventing it from radiating into space.
С
The gases absorb some of the heat from the Sun, holding it to keep it warm near Earth's surface.
D
The gases reflect some of the heat from Earth's surface, holding it away from the surface in space.
Answer: The answer is c
Explanation:
The gases absorb some of the heat from the Sun, holding it to keep it warm near Earth's surface. Hence option C is correct.
What is atmosphere?Atmosphere is defined as a layer of gas that surrounds a planet and is kept there by the gravitational pull of the planetary body. The atmosphere of the earth shields its people by absorbing dangerous sun rays and preserving a constant temperature. It protects Earth from many space hazards and enables life there. As a result, it is crucial for regulating climate and a source of life on planet.
The majority of the infrared energy from the Sun is absorbed and re-emitted in all directions by greenhouse gas molecules and clouds, creating the greenhouse effect. This causes the lower atmosphere and the Earth's surface to warm.
Thus, the gases absorb some of the heat from the Sun, holding it to keep it warm near Earth's surface. Hence option C is correct.
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A compound is known to contain 15% sulfur.
What mass of sulfur does this correspond to if there is a total of 200g of the compound containing sulfur?
Answer:
30g
Explanation:
According to this question, a sulfur-containing compound is said to contain 15 percent by mass of sulfur. This means that 15% of the total mass of the compound is the mass of sulfur in the compound.
The question further states that there is a total of 200g of the compound containing sulfur, this means that the mass of sulfur can be calculated this:
Mass of sulfur = 15% of 200g
15/100 × 200g
15 × 2
30g
Hence, there are 30g of sulfur in 200g of the sulfur containing compound.